Mary Pat GleasonProfessor Foxtrot (voice) Katie MarovitchMindy (voice) Ally BeardsleyRiver (voice) Raphael ChestangJason (voice) Mike TrappFrog (voice) / Sceneggiatore / Produttore Esecutivo David KernsAlexei Leonov (voice) / Produttore Esecutivo Grant O'BrienAndrew Jackson (voice) Joe OchmanAugust Bier (voice) Adam ConoverDoctor Gamma (voice) Sam ReichStubbins Ffirth (voice) / Produttore Esecutivo Ian James CorlettGeorge Psalmanazar / John Howard (voice) Siobhan ThompsonAmsterdam Woman (voice) Hesley HarpsFemale Antechinus / Female Bedbug (voice) Joe J. ThomasLytle S. Adams (voice) Jamieson PriceCIA Agent (voice) Nick ShakoourBarbier-Dufai (voice) Laura PostPrincess Pauline (voice) Gemma BishopCountess Anastasia (voice) Ashley GardnerBaroness Lubinska (voice) Rekha ShankarSloth (voice) Eric TiedeDolphin (voice) Brennan Lee MulliganGregor MacGregor (voice) Adam LustickSalomon August Andree (voice) Maury SterlingScottish Settler (voice) Jesse CortiPope Stephen VI (voice) Mike TrappFrog (voice) / Sceneggiatore / Produttore Esecutivo Sam ReichStubbins Ffirth (voice) / Produttore Esecutivo Shane RahmaniProduttore Esecutivo David KernsAlexei Leonov (voice) / Produttore Esecutivo Zach RobinsonTheme Song Performance Steve ThornelySound Mixer Ack KinmonthCompositore Musicale Originale Liana WrightResponsabile di Produzione Brittany LesterProduction Coordinator Chrissy Fiorilli-EllingtonCasting Annie HumphrevilleExecutive Assistant Lesa GreenfieldProduction Director Alex EdgeSupervising Producer Chetera BellAssistant Accountant Amanda Lenker DoyleCasting Claire RentonLead Animator 
